Green Isle, Minnesota Weather
Thunder stills across the plains. Day 93 of summer. Read this microseason across nine climate regions →
Green Isle weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 10:01 AM CDT · Open-Meteo
- TodaySep 21Light Drizzle later21%0.04″55°51°—
- TuesdaySep 22Clear——61°47°+6°
- WednesdaySep 23Overcast——67°45°+6°
- ThursdaySep 24Light Rain59%0.39″57°54°-10°
- FridaySep 25Light Rain10%0.46″60°56°+3°
- SaturdaySep 26Light Drizzle38%0.02″66°60°+6°
- SundaySep 27Overcast20%—69°55°+3°
Air quality now AQI 24 · Good
AQI 24 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points).
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
September dries up ditches or breaks down bridges.
- Moonrise
- 5:03 PM
- Moonset
- 1:20 AM
- In sign
- ♑︎ Capricorn
Thunder stills across the plains
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
Green Isle at a glance
- Today vs. normal: Today averages 53°F (high 55°F, low 51°F), 5°F below the 58°F normal for Sep 21
- Last frost: April 24 (1991–2020 median, NOAA station 22 km away)
- Microseason: Sep 21–25
- Planting calendar: September — plant garlic (overwinter); harvest tomatoes, peppers, beans, summer squash, winter squash
16-Day Forecast — Green Isle
- Mon56°51°30%
- Tue61°47°2%
- Wed67°45°4%
- Thu57°54°58%
- Fri60°56°20%
- Sat66°60°40%
- Sun69°55°24%
- Mon74°51°33%
- Tue68°54°41%
- Wed60°47°23%
- Thu59°41°12%
- Fri58°45°26%
- Sat57°47°24%
- Sun55°41°27%
- Mon56°38°19%
- Tue54°42°10%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Fall planting + final harvests
As of September 21, the season's first frost (typically October 15) is approaching. Pick what frost-tender plants still carry before the next cold front. This city's planting calendar for September: plant garlic (overwinter); harvest tomatoes, peppers, beans, summer squash, and winter squash.
SPC Convective Outlook
Storm Prediction Center — Green Isle
SPC includes Green Isle in the general thunderstorm area day after tomorrow — no severe risk, but storms are possible.
- TODAYNONENo severe risk
- TOMORROWNONENo severe risk
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook.
Sun & seasons in Green Isle
Green Isle sits in Sibley County, where the year’s longest day runs 15h 34m of daylight and its shortest just 8h 48m — a swing of +6h 46m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Minneapolis, the state’s largest city, lies about 41 miles to the ENE. The nearest town Green Isle tracks is Minneapolis, roughly 41 miles to the ENE.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| April | lettuce, peas, spinach, radishes | radishes |
| May | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, spinach, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| July | tomatoes, peppers, beans, squash, fall brassicas, carrots | lettuce, peas, spinach, beans, summer squash, garlic |
| August | — | tomatoes, peppers, beans, summer squash |
| September | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash |
| October | — | tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots |
| November | — | fall brassicas, carrots |
A year in weather
In Green Isle, July runs warmest near 71°F and January coldest around 12°F, while June is the wettest month (5.2 inches) and January the driest (0.7 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 12° | 0.7″ | 5 |
| February | 16° | 0.8″ | 5 |
| March | 29° | 1.5″ | 6 |
| April | 44° | 3.0″ | 9 |
| May | 57° | 4.3″ | 11 |
| June | 68° | 5.2″ | 11 |
| July | 71° | 3.5″ | 8 |
| August | 69° | 4.4″ | 9 |
| September | 61° | 3.2″ | 8 |
| October | 47° | 2.6″ | 8 |
| November | 32° | 1.3″ | 5 |
| December | 19° | 1.1″ | 6 |
Regional context
Similar climates Hamburg, MN, Arlington, MN, Plato, MN
Green Isle swings from 12°F in January to 71°F in July (59°F) per NOAA NCEI 1991-2020 normals; precipitation in Green Isle runs about 31.7 inches on roughly 90 measurable days.
Precipitation in Green Isle runs summer-dominant: June averages 5.2 inches across 10.9 days of warm-season storms, while January drops to 0.7 inches over 4.8 rainy days of drier cool air. Green Isle shares that warm-season-wet pattern with places like Hamburg, MN, Arlington, MN and Plato, MN.
Once Green Isle passes April 24, freezes fade and Green Isle's beds take kale, peas, spinach, and parsnips. Heat-demanding starts go out a fortnight on in Green Isle, after the soil warms and cold snaps clear. By October 15, frost is back in Green Isle — protect or harvest anything tender. That date is a median: Green Isle freezes sooner in half of years.
Similar climates: Hamburg, MN, Arlington, MN, Plato, MN, Norwood Young America, MN, Glencoe, MN.
Frequently asked
- When does it freeze in Green Isle?
- Frost typically leaves Green Isle by April 24 and returns to Green Isle near October 15.
- What is the rainy season in Green Isle?
- June is the wettest month in Green Isle, about 5.2 inches on average; the year totals roughly 32 inches.
- What is the warmest month in Green Isle?
- Green Isle peaks in July, when the mean runs near 71°F.
- What is the coldest month in Green Isle?
- January is Green Isle's coldest month, averaging about 12°F.
- When can I start a vegetable garden in Green Isle?
- In Green Isle, sow peas and hardy greens around April 24; Green Isle's tomatoes and peppers wait two weeks more.
- How many rainy days does Green Isle get?
- Expect roughly 90 wet days a year in Green Isle.
- What hardiness zone is Green Isle?
- With January around 12°F, Green Isle's zone reflects that minimum — the USDA ZIP map confirms Green Isle's band.
- What is the 10-day forecast for Green Isle?
- Green Isle's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in Green Isle?
- See this week's day-by-day rain chances for Green Isle in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Green Isle?
- Current conditions for Green Isle and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Green Isle forecast updated?
- The Green Isle forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Green Isle?
- Today's sunrise and sunset times for Green Isle are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for Green Isle?
- The next few days in Green Isle's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Green Isle sits at 44.7°N; its climate zone is warm-summer humid continental (Köppen approximation).
ZIP codes in Green Isle
- 55338